[ 'foo', 'bar', 'baz', 'foobar' ] bench. '2,030,000 per second.'
[ '' join: #( 'foo' 'bar' 'baz' 'foobar' ) ] bench. '665,000 per second.'
[ String streamContents: [ :out | out nextPutAll: 'foo'; nextPutAll: 'bar'; nextPutAll: 'baz'; nextPutAll: 'foobar' ] ] bench. '1,580,000 per second.'